With this fence, it could be possible to reduce additionally the mouse invasion and protect the chicks (if the poultry fence has bigger mesh size) against cats, other four feet predator and snakes. I would prefer the Boddington fence, as it is more stable and probably longer persistent as the real snake fence - If You don't prefer the traditional solution with stainless steel wire mesh with similar mesh size?

Depending upon both the height and type of chickens (heavies?), you may have happier and healthier chickens, if they can FLY up, rather than walk up a ramp. Even a box to jump up on first, can be a better alternative. This eliminates the mouse problem, also. Can't post pictures of several alternatives, but I no longer use ramps at all. It also makes it easier for you to care for the birds, not having to work around a ramp.